A.D. Usanov, A.E. Postelga, D.G. Verkhov, V.S. Tyrnov

Since the physics-chemical properties of water are changed under the influence of low frequency alternating magnetic field in a certain range of frequencies, it is of interest to study such influence on the complex biological objects containing water component , in particular, it is important to know how the change in the physical characteristics of the dry and pre-soaked plant seeds occurs under the influence of an alternating magnetic field. Therefore, the aim of this work was to determine by means of microwave techniques: how the alternating magnetic field with parameters of interest influences on the physical characteristics of such plant seeds, for example, as maize hybrid ESI 8/1, the corn hybrid ESI 29/1, chick-pea sort «Jubilee», sorghum sort «Volga 41», sorghum sort «Start», lentils sort «Nadezhda». The dependences of the changes in the dielectric constant and dielectric loss tangent for each sort of seeds (dry and wetted) on the frequency of the alternating magnetic field in the range of 2...50 Hz when amplitude B = 30 mT were obtained. Based on these results it can be concluded that under the influence of such field for 1 hour for most of the seeds in the frequency range of 2...10 Hz the dielectric constant and dielectric loss tangent of the seeds decrease, then with increasing of effecting field frequency, approximately from 10 Hz, these physical parameters increase. It has been observed that changes in the values of dielectric constant and dielectric loss tangent for the wetted seeds under the influence of an alternating magnetic field are more intensive than for the dry ones, due to the high content of water. It is shown that the maximum decreases of values of the dielectric constant and dielectric loss tangent of seeds (dry and wetted) are observed in most cases at the frequency of approximately 10 Hz, which may be associated with an increase of the concentration of dissolved oxygen in seeds at these frequencies.